CurtPalme.com Home Theater Forum

crt projectors · Joined: 03 Oct 2007 Posts: 39

hello deronmoped and analog rocks,

I have an Advent 1000a PJ with an ultra high gain screen of ten when flat, but on a curved screen, which is a asheet of aluminum. Someone at advent knew their screen technology!! The big disadvantage is that origial screenis not durable, repairable OR EVEN washable!!

I have found an ultra high gain cheap replacement for screen material. At the chain of fabric stores, called Jo Ann fabrics, they sell a 50% metallic fabric labeled as Silver lame" (7 to 10 gain easily) --the fabric is stretched over the original advent 1000A screen frame the fabric will have to be steamed to remove all wrinkles to avoid image distortion . A flat screen version can be made stretched over a large picture frame taught .

Initial tests look great on flat screen, higher gain than da-lite's high power compared directly The whites look whiter, brighter and less yellow than da-lite high power. --deronmpoed, if your hellbent on a curved scren, attach silver lame' to thin clear vinyl as backing first using Aileen's tacky glue-also found at jo ann . Pulling fabric slighty tight with clamps over vinyl til it dries With this even refelective surface, use more tacky glue to attach to curved screen. Any tacky glue that seeps to front side of silver lame" is OK even when dry, fabric wont be damaged as metal is nylon coated . when Fabric is dry and attached to vinyl, excess glue can be removed easily using a towel put in water, rung dry and gently rubbed over area with leftover glue. this will elininate screen dead spots.

deronmoped, are you using a novatron PJ??What PJ and lenses are you using?? with this setup, you should see crazy gain . the fabric has one side slighty more shiny, if piecing several segments together for screen size, keep this in mind!
the curved screen will bounce PJ sound back to you, if reproduce for PJ is in front! This creates an accoustical"surroud sound " effect, mostly observed in preferred area of PJ in back of it or close . sevral layer of fabric on top of vinyl will be even more reflective which correlated to a screen company company selling a 10 gain screen which is several lyer of reflective material and very thick. this screen material is ultra high end an cost tHOUSANDS of dollars to purchase, used to display PJ outdoor for big venues.

Digital PJ used for test no PJ hotspotting with 1,000 lumens, scren has a limited viewing area due to high gain screen direction and angle will determine you preferred seating areas, probaly close and behind PJ, where screen light bounces back at you the most.

A lot of info was learned making my ancient beast display a great screen. Dronmoped, you have screen shots please??
good luck required for older PJ 70s, 80s older units to have a great performance, newer ones will have a screen viewable in some ambient light. Fabric is washable from time to time with a damp cloth with water to remove dust.

Thumbs Up

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

I will take a look at this Silver Lame the next time I am near a Joanns. What is the price?

**AnalogRocks** · Posted: Thu Jun 19, 2008 6:11 am Post subject:

Sounds like a good material for an outdoor screen.....

ecrabb · Posted: Thu Jun 19, 2008 7:12 am Post subject:

This it?

http://www.joann.com/joann/catalog.jsp?CATID=cat323844&PRODID=prd33350

Wow, it's REALLY shiny. I'd be really curious to see how it looks. Might have to grab a small piece sometime to test for outdoor screen...

SC

crt projectors · Joined: 03 Oct 2007 Posts: 39

that's a great idea Ecrabb, an outdoor screen! That's the fabric, what was that? $6.99 per yard. A steamer or iron on steam mode to remove wrinkles, DON'T PUT IRON ON FABRIC, HOVER IRON DIRECTLY OVER FABRIC WHILE ON STEAM, 1/4" TO 1/2"directly above. this was conceived as solid metal screen of aluminum or stainless steel was too expensive to produce in metal sheet so not practical.

My advent due to go in for calibration, will post pics as soon as can. I hope someone finds this usefull to give new life to an older PJ still having a great picture

What type of PJ is deronmoped running with a curved screen? what type of lenses for PJ?

crt projectors · Joined: 03 Oct 2007 Posts: 39

...

**AnalogRocks** · Posted: Fri Jun 20, 2008 12:44 am Post subject:

I have a steam shark. Bet that would work.

ecrabb · Posted: Fri Jun 20, 2008 1:40 am Post subject:

Actually, it's only $3.99/yd! You could a 45x106 scope screen for $16 plus some PVC, rope, and stakes!

SC

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Trust me, it WILL hotspot like MAD. I bet you'll see 3 different hotspots, R G & B. It's about as shiny as the dull side of aluminum foil -- maybe shinier if you get it smoothed out! That stuff is only usable as a screen if you do something to tame the hotspot -- curve it into a torus, cover it with something (tulle, paint, whatever), or something like that.

**AnalogRocks** · Posted: Fri Jun 20, 2008 6:02 pm Post subject:

Advent Videobeam · Joined: 03 May 2008 Posts: 37

can someone test fabric with a high output CRT PJ. The digital PJ I used to test had no hot spot image error from projector at 1,000 lumens, only a bright uniform projected image showed. As shiny as this fabric is, it does disperse and diffuse light somewhat. Can someone with CRT screen shot post some pics??

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Hi!

Do you think it would work, if I were going to be sitting below the projector's level, to angle a screen made of this material downwards so that it reflected down to the viewer?
Also, how is the sharpness of the image? It looks like it would be a little fuzzy because of the surface variance?

Thanks!

**AnalogRocks** · Posted: Fri Jun 26, 2009 3:02 pm Post subject:

On a super reflective screen like this the angling trick may or may not work. As to the fuzzy, my aluminum foil has all sorts of bends and creases they didn't show up when the projector was on.

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Yes, an angular-reflective screen like this (reflects light like a mirror) is perfect for a ceiling-mount projector. The light reflects down to the viewer. Ceiling mounts don't work for retro-reflective screens (reflects light like a stop sign) because they bounce the light back up to the projector on the ceiling.

But remember it WILL hotspot. You'll want to pull it into a torus or similar curved shape for best results.

There was a guy (MTyson on AVSforum) who had a silver (mylar?) screen a while back, and he was projecting his CRT and a digital onto it. He used a torus and still saw some hotspotting.

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Oh, my setup is a bit weirder than a typical ceiling-mount, sorry - should've said so. Sad

I've got mine on a table, and I lie on the floor and kind of look up at the screen - or, I will, once I've got one. Razz

Just trying to get the front-row kind of viewpoint, you know? So the angles aren't quite as extreme as they might be in a ceiling-mounted situation...at least I don't think they would be?

Hm, I don't want hotspotting though. Sad

Guess I'll have to keep looking...

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Yeah, like I said the Hi Power is your best material of choice for that set up.